EP3013993B1 - Procédé de protection d'une roue de compression d'un turbocompresseur de gaz d'échappement et roue de compression - Google Patents

Procédé de protection d'une roue de compression d'un turbocompresseur de gaz d'échappement et roue de compression Download PDF

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Publication number
EP3013993B1
EP3013993B1 EP14780455.3A EP14780455A EP3013993B1 EP 3013993 B1 EP3013993 B1 EP 3013993B1 EP 14780455 A EP14780455 A EP 14780455A EP 3013993 B1 EP3013993 B1 EP 3013993B1
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EP
European Patent Office
Prior art keywords
compressor wheel
blades
leading edges
process gas
laser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14780455.3A
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German (de)
English (en)
Other versions
EP3013993A1 (fr
EP3013993B8 (fr
Inventor
Marc Hiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies GmbH
Original Assignee
Continental Automotive GmbH
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Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3013993A1 publication Critical patent/EP3013993A1/fr
Publication of EP3013993B1 publication Critical patent/EP3013993B1/fr
Application granted granted Critical
Publication of EP3013993B8 publication Critical patent/EP3013993B8/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers

Definitions

  • the invention relates to a method for protecting the compressor wheel of an exhaust gas turbocharger from damage and a compressor wheel.
  • a high-strength coating material for example, nickel can be used.
  • a compressor wheel for a turbocharger has a hub and a plurality of blades.
  • Each bucket has an entrance area, a central area and a rear area.
  • At least one of the blades has a surface provided with a surface ceramic layer of varying thickness. It is the Entrance area provided with a thicker surface ceramic layer than the central area and / or the rear area.
  • WO 2008/019721 A there is known a method of forming a wear protection layer on a material of aluminum, magnesium, titanium and their alloys, wherein parts of the surface of the material are hardened and the wear protection layer is formed on the hardened layer.
  • the formation of the wear protection layer takes place by means of laser oxidation in an oxygen-containing gas on a molten metal layer.
  • An object of the invention is to provide a method for protecting the compressor wheel of an exhaust gas turbocharger from damage in which neither high-strength materials nor a coating of the compressor wheel with a high-strength material are needed.
  • Another object of the invention is to provide a protected from damage compressor wheel of an exhaust gas turbocharger, which neither consists of a high-strength material nor has a coating of a high-strength material.
  • the advantages of the invention are essentially that by locally converting the light metal material of the surfaces of the leading edges of the blades of the compressor wheel using a laser beam and a process gas is achieved that these leading edges are hardened, so that an improved protection of the compressor wheel from damage is reached.
  • it is not necessary to use expensive high-strength materials as a compressor wheel material or as a coating material for the compressor wheel.
  • Another advantage of the invention is that a compressor wheel with the features according to the invention is comparatively easy to produce, since the laser beams required for carrying out the method and also the required process gas in each case in a simple manner targeted to the hardening parts of the compressor can be passed.
  • FIG. 1 shows a representation for illustrating the compressor wheel of an exhaust gas turbocharger.
  • This compressor wheel has blades 2, which are compressor wheel main blades and intermediate compressor blades. Each of these blades 2 has an entry edge 2a and flanks 2b. These flanks 2b have a part adjacent to the leading edge 2a and a part remote from the leading edge 2a.
  • the air-gas mixture enters, which contains small solid particles, in particular soot particles, in motor vehicles with exhaust gas recirculation.
  • the compressor wheel 1 rotates at a very high speed during operation of the exhaust gas turbocharger, damage to or wear of the inlet edges of the compressor wheel and thus of the entire can occur in the case of a compressor wheel consisting of a light metal due to the solid particles impinging on the inlet edges 2a of the blades 2 Compressor wheel come. As a result, the functionality of the exhaust gas turbocharger may be limited.
  • This disadvantage is avoided in the present invention by locally ensuring, in the region of the surfaces of the leading edges 2a of the blades 2, that the light metal material of the blades is converted using a laser beam and a process gas such that the surfaces of the leading edges are hardened and thereby provide better protection against damage from impinging exhaust particles.
  • FIG. 2 shows an enlarged partial view of the in the FIG. 1 shown, consisting of a light metal compressor wheel in which two of the inlet edges 2a of the blades 2 of the compressor wheel 1 and two of the flanks 2b of the blades of the compressor wheel and also a part of the Verêtrradzapfens 3 are shown enlarged. It can be seen from the part of the compressor wheel journal 3 shown that it has a lateral surface 3a and an end face 3b.
  • the leading edges 2a of the blades 2 of the compressor wheel 1 according to the present invention have a laser-oxidized, hardened surface. Furthermore, in the in the FIG. 2 also shown a portion of the laser oxidized, hardened surface of the entrance edges 2a adjacent flanks 2b of the blades 2 provided with a laser-oxidized, hardened surface.
  • This part of the flanks 2b of the blades adjacent to the laser-oxidized, hardened surface of the entry edges 2a, which is also provided with a laser-oxidized, hardened surface, can be chosen to be of different size depending on the respective application, as indicated by the arrows in FIG FIG. 2 is illustrated. However, this part comprises at most half of the total area of a flank, since this has proven to be sufficient for the practice.
  • the portion of the flanks 2b remote from the leading edges is not provided with a laser-oxidized, hardened surface.
  • FIG. 3 shows an enlarged partial view of the in the FIG. 1 shown compressor wheel for better illustration of Ver Whyrradzapfens 3, which has a lateral surface 3a and an end face 3b.
  • this compressor wheel journal 3 also has a laser-oxidized, hardened surface.
  • this laser-oxidized, hardened surface is provided either in the region of the lateral surface 3a or in the region of the end surface 3b or both in the region of the lateral surface 3a and in the region of the end surface 3b.
  • FIG. 4 shows a flowchart illustrating a method for protecting a compressor wheel from damage.
  • This compressor wheel has blades and a Ver emphasizerradzapfen and consists of a light metal, preferably aluminum.
  • a step S1 the surface of the entry edges 2a of the blades 2 is melted by means of a laser beam.
  • a supply of a process gas which connects to the melt.
  • hardening of the surface of the entry edges 2a occurs by cooling the process gas associated with the melt. If the compressor 1 is made of aluminum, then oxygen is supplied as the process gas. This connects to the melt formed by the application of a laser beam in the region of the surface of the entrance edges 2a to an aluminum oxide (corundum).
  • the parts of the flanks 2b of the blades 2 which are adjacent to the entry edges 2a are also protected from damage by impacting solid particles due to a hardening of their surface.
  • a part of the surface of the inlet edges 2a of the blades 2 adjacent flanks 2b of the blades 2 is melted by means of a laser beam and acted upon by a supplied process gas, which connects to the melt.
  • the compressor wheel journal 3 is additionally provided with a laser-oxidized, hardened surface.
  • the surface of the Ver emphasizerradzapfens 3 is melted by means of a laser beam and applied to a process gas which connects to the melt. Thereafter, a hardening of the surface of Ver emphasizerradzapfens 3 by cooling the process gas connected to the melt.
  • the compressor wheel is made of a different light metal than aluminum, then one or more gases other than oxygen are used as the process gas.
  • a compressor wheel according to the invention offers cost advantages, since costly coatings of the compressor wheel with a high-strength material and also a use of costly, high-strength materials for the entire compressor wheel are not needed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Procédé de protection d'une roue de compresseur (1) en métal léger, comprenant des aubes (2) et un pivot de roue de compresseur (3), d'un turbocompresseur à gaz d'échappement, le procédé comprenant les étapes suivantes :
    - faire fondre, au moyen d'un faisceau laser, la surface des bords d'attaque (2a) des aubes (2) et d'une partie des flancs (2b) des aubes (2) qui sont adjacents à la surface des bords d'attaque (2a),
    - amener un gaz de traitement qui se lie à la matière en fusion,
    - faire durcir la surface des bords d'attaque (2a) et la surface de la partie des flancs (2b) des aubes (2) qui sont adjacents à la surface des bords d'attaque (2a) par refroidissement du gaz de traitement lié à la matière en fusion,
    - la partie fondue des flancs (2b) des aubes qui sont adjacents à la surface des bords d'attaque (2a) comprenant au plus la moitié de la surface totale d'un flanc.
  2. Procédé selon la revendication 1, caractérisé en ce que de même la surface du pivot de roue de compresseur (3) est fondue au moyen d'un faisceau laser, est soumise à un gaz de traitement lié à la matière en fusion, et le durcissement de la surface du pivot de roue de compresseur (3) est effectué par refroidissement du gaz de traitement lié à la matière en fusion.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la roue de compresseur (1) est en aluminium et de l'oxygène est amené comme gaz de traitement, lequel oxygène se lie à l'aluminium dans la région de la surface des bords d'attaque (2a) des aubes (2) pour former un un oxyde d'aluminium.
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que la roue de compresseur est en un métal léger autre que l'aluminium et en ce que de l'oxygène et un autre gaz sont utilisés comme gaz de traitement.
  5. Roue de compresseur (1), laquelle est en un métal léger et comprend des aubes (2) et un pivot de roue de compresseur (3), caractérisée en ce que les bords d'attaque (2a) des aubes (2) et une partie des flancs (2b) des aubes (2) qui sont adjacents à la surface, oxydée au laser, des bords d'attaque (2a) comportent une surface durcie oxydée au laser, ladite partie constituant au plus la moitié de la surface totale du flanc.
  6. Roue de compresseur selon la revendication 5, caractérisé en ce que le pivot de roue de compresseur (3) comporte également une surface durcie oxydée au laser.
EP14780455.3A 2013-10-25 2014-09-30 Procédé de protection d'une roue de compression d'un turbocompresseur de gaz d'échappement et roue de compression Active EP3013993B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013221712.9A DE102013221712A1 (de) 2013-10-25 2013-10-25 Verfahren zum Schutz des Verdichterrades eines Abgasturboladers vor einer Beschädigung sowie Verdichterrad
PCT/EP2014/070973 WO2015058938A1 (fr) 2013-10-25 2014-09-30 Procédé visant à protéger la roue de compresseur d'un turbocompresseur à gaz d'échappement contre un endommagement éventuel et roue de compresseur

Publications (3)

Publication Number Publication Date
EP3013993A1 EP3013993A1 (fr) 2016-05-04
EP3013993B1 true EP3013993B1 (fr) 2019-06-26
EP3013993B8 EP3013993B8 (fr) 2019-08-07

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ID=51659633

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Application Number Title Priority Date Filing Date
EP14780455.3A Active EP3013993B8 (fr) 2013-10-25 2014-09-30 Procédé de protection d'une roue de compression d'un turbocompresseur de gaz d'échappement et roue de compression

Country Status (3)

Country Link
EP (1) EP3013993B8 (fr)
DE (1) DE102013221712A1 (fr)
WO (1) WO2015058938A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006046503A1 (de) * 2006-08-18 2008-02-21 Mg-Micro Galva Gmbh Laseroxidieren von Magnesium-, Titan- oder Aluminiumwerkstoffen
DE102006051709A1 (de) * 2006-10-30 2008-05-08 AHC-Oberflächentechnik GmbH Erzeugung von Verschleißschutzschichten auf Werkstoffen aus sperrschichtbildenden Metallen oder deren Legierungen mittels Laserbehandlung
GB2475533B (en) * 2009-11-21 2016-04-13 Cummins Turbo Tech Ltd Compressor wheel
DE102012002284B4 (de) * 2012-02-06 2014-08-21 Audi Ag Verfahren zum Herstellen eines Turbinenrotors eines Abgasturboladers sowie Verwendung eines Turbinenrotors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2015058938A1 (fr) 2015-04-30
EP3013993A1 (fr) 2016-05-04
EP3013993B8 (fr) 2019-08-07
DE102013221712A1 (de) 2015-04-30

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